Q:

What are mortar joints?

A:

Quick Answer

Mortar joints are the spaces between concrete blocks, bricks or glass blocks that are filled with mortar. To create a mortar joint, a mason has to use jointers, beaders or rakes to run through the mortar before it is solid.

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Full Answer

Concave, V-joint, weather, flush, squeezed, beaded, raked, struck and grapevine are types of mortar joints. Concave joints are the most common joints and they are used to cover little irregularities. V-joints are used to highlight joints and conceal irregularities in laying and provide a line in mortar joints. Weather joints accent horizontal joints. Flush joints are used where a wall is plastered or to hide joints under paint.

Squeezed joints have a rustic look and are not suitable for exterior building walls. Beaded joints are not recommended for exterior use because of the exposed edge. Raked joints emphasize joints and are not recommended for outside use, unless they are tooled at the base of a mortar joint. Struck joints highlight horizontal joints and are also not recommended for exterior use because water can pierce the lower edge. Grapevine joints show horizontal indentations.

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